M5stickc plus2 and Tft_espi problem.

Kazik

Hi
I was trying to compile esp32 marauder for m5stickc plus2 but I have problem with lcd. It stays black. Fw seems to work because cli works. I changed pins and driver for ST7789_2 in User_Setup.h for Plus2 and nothing. For esp32 marauder you have to use old tft_espi lib (2.3.70) to proper compilation process. Maybe someone used tft_espi lib with plus2? There is compiled fw for plus (not plus2). So I suppose for Plus2 it is possible too.

felmue

Hello @Kazik

the LCD backlight is probably missing. It's controlled via GPIO27 driving VLED. See schematic. Also in the GFX library GPIO27 is setup as PWM backlight. See here.

Thanks
Felix

Kazik

@felmue said in M5stickc plus2 and Tft_espi problem.:

Hello @Kazik

the LCD backlight is probably missing. It's controlled via GPIO27 driving VLED. See schematic. Also in the GFX library GPIO27 is setup as PWM backlight. See here.

Thanks
Felix

Thank You very much it helped. But now i must be connected over usb to show something on screen. Without usb screen blinks for sec and black. And navigation over menu is very poor

felmue

Hello @Kazik

please read the yellow note from the documentation.

After triggering the wake up signal, the hold(G4) pin needs to be set to a high level (1) in program initialization to maintain the power supply, otherwise the device will enter the shutdown state again.

Thanks
Felix

Kazik

@felmue said in M5stickc plus2 and Tft_espi problem.:

Hello @Kazik

please read the yellow note from the documentation.

After triggering the wake up signal, the hold(G4) pin needs to be set to a high level (1) in program initialization to maintain the power supply, otherwise the device will enter the shutdown state again.

Thanks
Felix

I dont know where to put this in marauder code. I need advice. I managed to compile the code to work on plus 2. only works if the usb cable is connected. Marauder code is very problematic for M5Stickc.

felmue

Hello @Kazik

you'd put that at the beginning of setup().

Thanks
Felix

Kazik

@felmue just simple like this?
// Set digital pin 4 (GPIO4) to high state
pinMode(4, OUTPUT);
digitalWrite(4, HIGH);

felmue

Hello @Kazik

yes, that should do it.

Thanks
Felix

Kazik

@felmue
Nothing changed :( i have no clue what is wrong.
EDIT Now its working Thank You very much

Kazik

@felmue hellol could you tell me is pins to connect sd card module to plus2 are the same as plus?
3V3 > 3V3
CS > GND
MOSI > G26
CLK > G0
MISO > G36
GND > GND.
Of course I must change pins in source code.

felmue

Hello @Kazik

from what I can tell looking at the documentation for the two M5Sticks here and here I would say the same GPIOs can be used for both.

Please note: I do not have an M5StickCPlus2 so I cannot test this myself.

Thanks
Felix

Kazik

@felmue So I source code I must change CS pin to LOW? To match for GND?

felmue

Hello @Kazik

SPI bus can handle multiple (slave) devices. Each has its own CS. See here.

That said, if the SD card it the only slave device it's ok to connect its CS directly to GND. If you want to use a GPIO for CS then yes, set it to LOW.

Thanks
Felix